I've been meaning to buy one of these Cult Society ones for my mk3 for a few years now but they're so bloody expensive, I had one on my last mk2 and it was decent quality and really tidied up the rear hatch.
You can get them with or without the option to install the original push button lock which fits in a vertical position instead so as to not be seen.
I've actually got a modified (not by myself) standard plinth handle with the lock recess smoothed over that i acquired a little while ago that i could be persuaded to sell, it simple fits over the standard boot lock and covers it rather than fully deletes it.
It could do with painting (it's currently Indian red) but might suit you needs?